Adele notches 15th week at No. 1

'21' on track to reach 6 million sales mark

Maintaining its torrid pace, Adele’s “21” hangs onto its No. 1 slot on the U.S. album chart for a 15th non-consecutive week.

In its 46th chart week, the British singer’s Columbia set sold 144,000 copies, according to Nielsen SoundScan data for the week ending Jan. 8. It was the only title to move more than 100,000 units last week.

If “21” can hold the apex next week — a likely proposition amid a thin January release schedule — it will be the first album to log 16 weeks at No. 1 since the blockbuster soundtrack for “Titanic” attained that feat in 1998.

Barring a huge sales slump, the collection — up for six Grammys next month — should top the 6 million sales plateau on next week’s chart.

The week’s only top 10 debut — in fact, the only album to bow in the top 50 — is Oklahoma band SafetySuit’s “These Times,” (Universal Republic), which enters at No. 7 with a 26,000-unit tally. Group’s sophomore album was launched as an iTunes exclusive.

Week’s other top 10 albums all logged percentage declines with flagging post-holiday sales.